Fuel pump mounting



Feb. 3, 1942'. A. c. KORTE EI'AL. 2,271,550

FUEL PUMP MOUNTING 7 Original Filed April 20, 1940 4 Sheets-Sheet 1 6 56INVENTORS ALFRED C.KORTE KENNETH LANNERT ATTORNEY Feb.3, 1942. A. c.KORTE El AL FUEL PUMP MOUNTING Original Filed A ril 2o, 1940 4Sheets-Sheet 2 llllllllll FIG.3.

INVENTORS 37a ALFRED c. KORTE KENNETH LANNERT ATTORNEY Feb.v3, 1942. A.c, KORTE ETAL 2,271,560

' FUEL PUMP MOUNTING- Original Fiied April 20, 1940 4 Sheet s-Sheet 3FIGLIO.

- INVENTORS ALFREDQKORTE KENNETH LAN NERT Mu. mtg

' ATTORNEY 3, 1.942 A. c. mm m 2,271,560

FUEL PUMP MOUNTING original Filed April 26, 1940 4 Sheets-Sheet 4 FIG.7.

INVENTORS ALFREDC.KORTE KENNETH LANNERT MuR FIG.9.

. ATTORNEY Patented Feb. 3, 1942 UNiTED STATES PATENT OFFICE s I3,271,560. I

Alfred C. Kortc, St. Louis, and Kenneth Lannert, St. Johns Station, Mo.,assignors to Carter Car buretor Corporation, St. Louis, Mo., acorporation of Delaware Original application April 20, 1940, Serial No.

330,704, now Patent No. 2,260,946, dated October 28, 1941.

Divided and this application March 18, 941, Serial No. 383,922

4Claims. (01.248-) I This invention relates to automotive 'fuel pumpsand more particularly to electrically operated tion. Although vibrationmay be reduced to a minimum by proper pump design, it is quite 'obviousthat even vibrations'of very small amplitude will be, if not arrested byproper dampening means, transmitted to the comparatively thin metalpanels of the supply tank through the mounting and will therein begreatly amplified and resounded. v

' It is an object of the present invention to provide novel resilientmounting means for interior tank mounted fuel pumpsof the abovecharacter, which is universally adaptable.

is supplied by a storage batteryindicated at 5- and' It is a furtherobject of the present invention I to provide a novel electricalconductor for an interior tank mounted fuel pump.

Fig. 1 is a schematic illustration of a fuel supply system for aninternal combustion engine comprising a fuel pump and mountingconstructed in accordance with the present invention.

Referring to the drawings numeral I generally indicates an electricallydriven centrifugal pump which is mounted in and on the bottom of a fuelstorage tank .2. A hand-hole 3 in the top of the tank provides access tothe pump. The hand-hole is provided with a cover plate 4. Electricalenergy for the operation of the pump is conducted thereto through acircuit comprising a conductor 6 having a switch I interposed therein, aconnector generally indicated at 3,

a two-way conductor, generally indicated at 9,

and grounds l0 and II. Fuel is conducted from the pump to a tank fittingl2 bymeans of a flexible conductor l3 constructed of fuel resistantmaterial, and therefrom to a carburetor It by means of a fuel line l5;The fuel pump I comprises a lower casin l6 and an upper casing II whichare attached by means of their respective flanges-i8 and I9 andattaching screws 20. A sealing gasket 20:: is provided between flanges.l8 and I3. Rotat ing within the upper and lower casing and bearinginthe respective ends 2| and 22 thereof is a rotor 23, which comprises, inrigid assembly,

on a rotor shaft 24, an armature 25, an impeller Fig. 2 is a plan viewof the fuel pump and I mounting taken on line 2-2 of Fig. 1.

Fig. 3 is a vertical section taken on line 33 of Fig. 2. l

Fig, 4 is a vertical section taken on line. 4-4 of Fig. 2.

Fig. 5 is a transverse section taken on line 5-5 of Fig. .4, through theimpeller and volute.

Fig. 6 is an enlarged detail of the resilient pump support and clampingtube.

26 and a commutator 21. A laminated field frame 28 carrying a fieldwinding 29 indicateddisposed in a circular formation which is conicentrically true with the bearing end 2! I in true proportion in theseveral views has been I Fig. 7 is an enlarged fragmentary plan view ofthe lower pump casing taken on line I-l of Fig. 3, other assembledcomponents being 'removed.

Fig. 8 is a sectional view of Fig. 7 taken on Fig. 10 is an enlargeddetailed view of the electrical connector attachedto the top of the fuelI tank.

.Fig, 11 is a sectional view of the electrical connector shown in Fig.10.

The lower pump casing I6 isprovided with a surface of bore 3| are anumber of ribs 33 which are shown, enlarged out of proportion, in viewsFigs. 7, 8 and 9. Attempts to show these ribs avoided for the reasonthat in practice it will be desirable to minimize the height to whichthey rise above the surface of the bore and which will probably be lessthan .015 of an inch. The

cover 35 and the lower tapered portion 36 on the top casing H. The edgesor rims of both I members 34 and'35 and the lower portion 36 of casingll have substantially the same taper as bore 3|.

The volute member 34 and the cover 35 are firmly'pressed downward'by thelower end 36 of the top casing as the attaching screws 23 are tightened.A comparatively soft compressible ring gasket 32a is provided betweenvolute member 34 and shoulder 32 which provides through brush 53, andthe outer casing 43 of conductor 3 completes the ground to the tank 2.Tank 2 is usually grounded to the frame in most automotive installationsas well as the battery.

The pump is mounted on a pair of U-shaped brackets 54 which may bespot-welded or rigidly attached at their base in any suitable manner tothe bottom of tank 2. The upwardly extendupon the dimensions of thecomponents. It will be seen that by providing a tapered press fitassembly of the volute and its cover and of the upper and lower casing,concentricity which is highly essential; is assured.

By provision of the ribs 33, which are compressible by reason of theirproportion, the manufacturer may work within limits ranging from a metalto metal fit to a substantial press fit. He

1 may, therefore, allow the reasonable tolerances nates the possibilityof distorting the top casing flange l9.

For journalling the ends of rotor shaft 24 a pair of radialself-aligning bearings 31 retained in the upper and lower ends of thepump casing by suitable retainers 38 are provided and to take thevertical thrust a ball, thrust bearing 31a is provided. The upper casingI1 is further provided with vent passages 39 and 40 for the purpose ofrelieving pressure which may build up in the upper chamber which isdefined by the casing l1 and the volute cover 35.

The two-way electrical conductor 9 comprises a flexible centralconductor 4| which is surrounded by an insulator 42 which, in turn, issurrounded by a flexible, braided covering 43 which also serves as aconductor.- The inner conductor 4| is connected to the conductor 6 andthe outer conductor 43 is connected to the metal fuel tank I by means ofthe connector 8 which is inserted upwardly through a perforation in thetop of tank 2. The connector 8 comprises a non-conducting member 44having an upwardly extending bore which receives the conductor 9. Theinner conductor 4| is farther extended upwardly and is, connected toconductor 6 through the insert 45 and screw 46. The non-conducting ingbracket legs 55 have their endportions 53 formed so as to besubstantially horizontal. The edges of ends 56 are further formed upwardto result in their having a semi-circular section. Four cylindricalbosses 51 cast integral with the lower pump casing are provided. Thebrackets 54 are so arranged with respect to the pump that the axis ofthe cylindrical bosses 5'I coincide with an axis through the center ofthe semi-circular bracket end portion 56. The bosses 51 havelongitudinal blind bores 59 which receive one end of the resilientcylindrical shear pins 30. We prefer to construct the pins 60 of a.commercial synthetic material having properties similar to rubber,except that they shall not be affected by gasoline as rubber is. Theother ends of pins 60 are inserted in split clamping tubes 6!. Tubes 5|are provided with through perforations to receive screws 62. The bracketend-portions 56 are also perforated and internally screw threaded asindicated at 53 to receive screws 52.

In assembly, one end of a resilient pin 60 is inserted in a clamp tube5|, the other end into a bore 59 in a boss 51. A screw 52 is theninserted through the tube BI and tightly engaged in a threaded bracketend 56 thereby tightly clamping the pin in the split tube and attachingboth to the bracket.

Pump casing l5 isfurther provided with inlet ports 54. A discharge port65 and a short outlet riser 66 formed in an outlet boss 61. 'The outletboss being internally screw threaded to receive a conduit fitting 68. Acircular screen 59 covering member 44 is provided with a lower flangeportion 41 which provides a stopping shoulder. A

cup-shaped retainer 48 attached to the underside of the top of the tankby screws 49 firmly holds the member 44 in place. The retainer 48 isprovided with a central perforation through which passes the conductor9, and a plurality of surrounding, downwardly formed tangs 50 which,after the insertion of conductor 9, are formed inward to rigidly clampthe conductor in place. The other end of conductor 9 is clamped in aperforated boss 5| on the casing I! by rotary swaging. The innerconductor 4| extends downwardly into the pump casing and is connected tothe field 29 and the commutator brush 52. Brush 52 is insulated'from thepump casing. The armature is grounded to the pump casing inlet port 64is provided.

In operation, fuel flows into the lower casing through port 64, fromwhence it flows in the ,direction of the arrows into the central openingof the impeller 26, from where it is .thrown by centrifugal forceoutward through the volute channel and port 65.

The detailed drawings and description are intended to be illustrative,not limiting and the use .of all modifications within the scope of theaping structure comprising U-shaped brackets, and

resilient shear members, carried by said casing and projectinghorizontally therefrom, each of said shear members being supported by avertical leg of one of saidbrackets.

3. In a fuel pump, a casing having a plurality of horizontal recesses,mounting structure for resiliently supporting said pump'comprising aplurality of resilient members received on one end in said horizontalrecesses and projecting substantially horizontally from said casing, and

bracket means for supporting the proiecting'ends bers attached to theprojecting ends of said reof said resilient members. I

4. In a fuel pump, pump housing structure having recesses formedtherein, mounting structure for said pump comprising resilient connectorelements received in saidrecesses and projecting substantially from saidhousing, clamping me'm-' siiient connector elements, rigid support meansadapted to receive said clamping members, and

screw threaded means for attaching said clamp- 5 ing members to saidsupport meansw ALFRED c. KORTE. Kmmn'm LANNERT.

